If you are talking about Costco, which carries Tree Top (from concentrate) and Kirkland (not from concentrate), I have done both several times (about 5x 5-gallon batches of each) over the last year.
If I had to pick, I'd say not from concentrate is what I personally like better - the plain juice just tastes better to me - and I think of brewing cider like cooking with wine.... Don't cook with a wine you wouldn't drink, so don't brew a juice you wouldn't drink either. In all reality though, I don't think there is a huge difference. I haven't noticed a big jump in cider quality until you jump up to expensive fresh-pressed orchard type juice.
In the end - brew your cider with what you got, drink it, then buy the other kind next time, drink that, then decide for yourself. And enjoy the experiments in the meantime!
On Deck: Cider XV
Primary: Cider XIV (Apfelwein)
Bottled: Cider XIII
Previously Enjoyed: Cider I, II, III, IV, V, VI, VII, VIII, IX, X, XI, XII